Steam-valve



(No Model.)

G. S. BELL.

l STEAM VALVE. No. 448,626. y Patented Mar. 24, 1891.

O fr.

s UNITED STATS y PATENT Ormes.

GILBERT SHERVQOD BELL, OF MOBILE, ALABAMA.

STEAM-VALVE.

SPECIFICATION forming part of Letters Patent No. 448,626, dated March24, 1891.

Application filed December 16, 1890. Serial :NoA 374,896. (No model.)

TOYMZZ wil/0m, it' may concern,.-

Be it known that I, GILBERT SHERwooD BELL, a citizen of the UnitedStates, residing at Mobile, in the county of Mobile and State ofAlabama, have invented a new and useful Steam-Valve, of which thefollowing is a speciiication.

This invention relates to steam-valves; and it has for its object toprovide a device of this class which shall be simple in construction andeasily operated, and which shall occupy less room than the ordinaryTglobe or throttle valves, so that it may be more conveniently operatedin cramped and confined places.

Thein vention consists in the improved construction, arrangement, andcombination of parts, which will be hereinafter fully described, andparticularly pointed out in the claims. In the drawings hereto annexed,Figure l is a part sectional elevation of the valve constructed inaccordance with my invention. Fig. 2 is a sectional view taken on theline 2 2 in Fig. l. Fig. is a sectional View of the valve removed fromthe casing, on the line 3 3 in Fig. 1. Fig. 4is a vertical sectionalview of the casing. Fig. 5 is a top view of the device as shown in Fig.l. Fig. 6 is a part sectional elevation showing a modilicationof myinvention.

Like numerals of reference indicate like parts in all the figures.

l designates the valve-easing which is provided with flanges 2 and 3 andwith interior annular shoulders, as shown at 4 and 5.

6 designates the valve-seat, which is mounted upon the shoulder 4 in thecasing, where it may be secured by means of bolts or other fasteningdevices, or it may be simply pressed into position or cast solid withthe valve-casing. The valve-seat has a central boss 7, in which issecured a pin 8, upon which the valve 9 is pivotally mounted, said valveconsisting of a circular disk, a portion of the periphery of which isprovided with teeth or cogs 9. The said valve has a central boss l0 toafford a bearing for the pin 3, and upon the latter is coiled a springll, one end of which bears against the valve and the other end against awasher 12, which is held upon the pin 8 by means of jamnuts 13. The saidspring serves to hold the valve against its seat with just enoughtension to make a tightjint without causing undue friction. rlhe valveis provided with sector-shaped openings 14, adapted to register withcorresponding openings l5 in the valve-seat. The latter is provided onits outer side with tapering strengthening-ribs, as shown at 16, and thevalve is likewise provided with ribs 17 for the purpose of enabling itto resist any strain to which it may be subjected.

The casing l is constructed with a chamber 1S, to accommodate a worm 1H,which is mounted upon the square portion 20 of a shaft 2l, the inner endof which has a bearing at 22 in the body of the casing l, at the innerend of the chamber 13. The shaft 2l has a shoulder 23 bearing against ashoulder 24, formed in the casing, which latter is bored out to form thesaid shoulder and to accommodate the packing-gland 25. Packing 26 isinterposed i between the said packing-gland and the shoulder or flange23upon the stem or shaft 2l, which latter is thus held securely againstlongitudinal movement. The packing-gland, which is provided at its outeredge with a flange 27, may be screwthreaded, bolted, or otherwiseconnected with a flange 28 upon the casing. The worin 19 engages theteeth or cogs of the valve, and the rotary movement of the latter may belimited by a stop-pin 29, engaging a groove or shoulder formed in thevalve. If preferred, the stop-pin may be attached to the valve andengage a groove in the casing.

The fiange 2 of the valve-casin g is adapted to be bolted or otherwiseconnected with a pipe leading to the steam-chest. The flange 3 isconnected with a flange 30, having an annular interiorly-threaded rim 31of standard measurement adapted to be connected with a pipe leading tothe boiler. The flange 30 is connected by a pipe 32havingasuitably-constructed valve 33 with the casing l in rear of thevalve-seat. This serves for the admission of steam in rear of the valveprevious to operating the latter in order that it may be balanced, andconsequently easily operated without the friction which would be causedby the pressure of steam upon the face of the valve. The bore of thevalve-casing in rear IOO of the valve-scat is larger than the interiordiameter of the flange 2, it being bored out, as shown at St, to make itof the same area as the interior diameter of the rim 3l, this being forthe purpose of permitting the unobstructed passage ol' steam.

The operation of this part ol my invention will be readily understood.The stem or shaft 2l may be manipulated by a handwhecl 35, upon itsouter end to cause the worm lf) to engage the toothed portion of thevalve, which latter may thus be adjusted to any desired position.

In Fig. G ol the drawings I have shown a modification of my inventionwhich relates solely to the means for operating the valve.

In this case I substitute for the worm 19 aA rack-barSG, formed upon astem 537, the ends of which are cylindrical in shape. The caslng l isprovided with a chamber 3S, to admit of the longitudinal movement of therack-bar which is mounted therein, and the ends of which extend throughpacking-boxes 3S) and 40, formed at the ends of said chamber, and theformer of which is sufficiently large in diameter to admit ot' theinsertion through it of the rack-bar. The end of the stem 37, whichextends through the packing-box 40, is connected pivotally with a lever4-1, which is pivoted to a link t2, the inner end of which is pivoted tothe casing at 3. #It is a rod or bar pivoted to the casing at t5, andhaving at its outer end a slot 4G. A bolt 47 extends through the saidslot and through the handleverll, and is provided with a jam-nut 4S,having a handle It), by means of which it may bcconvenientlymanipulatedto retain the hand-lever Il in any position to which it may be adjusted. It will be readily seen how, by manipulating the hand-lever il,the rackbar maybe operated to adj ust the valve to any desired position.

The advantages of my invention will be readily understood by thoseskilled in the art to which it appertains from the foregoingdescription, taken in connection with the drawings hereto annexed. Theconstruction is simple and inexpensive, the valve is easily operated,and is readily accessible when necessary, for the purpose ot' repairingit.

Having thus described my invention, I claim and desire to secure byLetters Patent of the United Statesl. ln a device of the classdescribed, the combination of the valve-casing l, having annular llanges2 3 and shoulders 4 and 5, the valve-seat mounted on the shoulder Lt andhaving pin 8, the valve mounted on said pin and having a bearing on theshoulder 5, and means for operating the valve, substantially asdescribed.

2. In a device of the class described, the combination ot the valvecasing l, having` annular flanges 2 3 and shoulders 4 5, the valveseatmounted on the shoulder 4- and having pin S, the valve mounted on saidpin and having` a bearing on the shoulder 5, the flange SO, bolted tothe flange 3 and having a threaded rim, a valved pipe connecting` theflange 30 with the casing in rear of the valve-seat, and means foroperating the valve, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

GILBERT SHER WOOD BELL.

lVitnesses:

THos. W. WILLIAMS, E. G. RICKARBY.

